If such a tape existed for anyone else and was in the hands of a foreign government, that person would not be able to get the lowest level of security clearance in the US because the opportunity for blackmail places them at great risk.
In an ideal world Americans would be more like the French and not care about people’s personal consensual sex lives at all, in which case the tape would lose all its blackmailing power, but since the American public does care, the possibility of blackmail is real.
But that's a problem because it's exactly this kind of conversational shift that makes derailment a good tactic for mitigating the impact of political scandals.
It's unclear to me whether that even counts as a kink: if it's true, I'm not sure Trump was getting a sexual thrill out of it. My guess is that it's more of an unchecked mental illness, with Trump as Captain Ahab chasing after his great white whale.
AFAIK, there's no more or less reason to believe it now than there was when it first came out.
He is also dumb, but that has nothing to do with being a racist or our discussion.
I speculate you are right, though, that less people these days would give a flip about whether one modeled for a underground fetish publication in the late 1960s, even if true.
Unfortunately, there are still a significant amount of people who would have an issue with this. But to me (and probably others), the claims made say nothing about Ann Dunham (even if they were true). But they say a heck of a lot of negative about the authors of what seems to be the primary source of this muckraking [2].
[1] https://skeptics.stackexchange.com/questions/11135/are-these... (link warning, possibly NSFW) [2] https://en.wikipedia.org/wiki/Dreams_from_My_Real_Father